Improvement in air-blast engines



vlillings of the cylinders dilated latr JOHNN GRIMM, lOISS T.-LOUIS,.MISSOUR.I.

Letters Patent N 96,223, dated October 26, 1869.

IMPROVEMENT IN AIR-BLAST ENGINES.

The

Beheule referred to in these Letters Patent and making part of the same To all whom it may concern:

Be it known that I, JOHNN GRIMM, of ySt. Louis, in the county of St. Louis, and State of Missouri, have made certain new andv useful Improvements in Air-Blast Engines; and I do hereby declare that the following is a full and clear description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of this invention is in the arran gement `of two bells or cylinders dipping into a cistern of water,

and arranged with such valvesthat when withdrawn from the water, air shall enter, and when forced into the fluid, air shall he forced into thc blast-tubing; and said nature is in the general and detail con- 'truction of said engine as hereinafter more fully-set orth.

'Io enable those skilled herein to make and use my said invent-ion, I will now fully describe the same, referring to Figure l as a vertical sectional elevation, and to Figure`2 as a plan.

I construct an enclosing-cistern, A, and place water therein. Within said cisternl arrange the cylinders B, guiding the same by the side guides C, and suspending the same by the connecting-rods Dfrom the walking-beam E, which is journalled at F on the main frame G.

The detail construction of the said parts may he in any usual form, and nothing herein is claimed.

Further, to guide said cylinders B, and to connect more perfectly with the blast-tubes, I'arrangc the caps H withinthe cylinders B. The blast-tubes Il connect with said caps H. Said blust-pipes are carried to and supported on the bed of the cistern iA, and pass to the air-vessel K, from whence a single blast-tube, L, 'goes to the furnace where the blast is required.

K is used to receive the successive B, and acts by its capacity, both as an air-cushion and pressure-equalizer; so that the air passing out at l is in a more uniform stream.

The air-vessel K may further be arranged with double walls, between which steam, or the hot gases formed by combustion, maybe introduced by a pipe, I', for heating the air for' the blast.

The air-vessel Again, vessel \K, in that manner adding 'vapor and its components, oxygen and hydrogengases, to the blast, and thereupon increasing the heat produced in the furnace.

In the heads b, of the cylinders B, I arrange the i valves M. These are usually dat hinged plates of iron, being hinged at m, and having the flexible (usually rubber) support m' at the opposite edge.

On the down-stroke of the cylinders B, the air within the same will, by its pressure, close the valves M, and will be forced through the blast-tubes I tothe furnace.

The caps H will partly prevent the escape of air, and the water of the cisteru A willy elfectually do the same.

On the up-stroke of the cylinders B, the air will force down the valves M and enter thecylinders B.

This device is peculiarly fitted to supply large quantities of air, and owing to the nou-use of packings and stuffing-boxes, there is no need of repair or danger of disorder. At the same time, the air-checking i'luid A', of the cistern A, gives up vapor to the air iu the cylinders; in other words, the air is moistened; thereby oxygen and hydrogen are brought to the combustion of the furnace, causing extraordinary heat.

From the air-box K, two, three, or more pipes, L, may pass out, delivering the air to seyeral points, either of the same furnace or of dilerent'furuaces Having thus fully described my invention,

The apparatus for forcing air and 'heating the same, composed of the cylinders B, operated by a beam, E, and conuectingwith the diaphragms H, pipes I,'the heater K, and blast-tube L, when arranged subst-antially as and for the purposes set forth.

In witness whereof, I have hereunto set my hand, this 11th day of November, A. I). 1868, iu the pres.- ence of J OHNN GRIMM.

Witnesses l:

GEO. P. HEBTHEL, Jr., WM. W. HEBTHEL.

steam may be introduced directly into thev 

